NAIROBI, Kenya — The head of Kenya’s wildlife service says Ethiopian and Kenyan authorities have seized more than 2,600 pounds (1,200 kilograms) of ivory from nearly 100 illegally killed elephants.

Julius Kipng’etich said Wednesday that specially trained dogs had sniffed out a consignment of bloodstained tusks at Kenya’s national airport late Tuesday. Another shipment of tusks sent by the same individual had been seized Monday at the airport in Ethiopia’s capital.

A worldwide ban on ivory trade was agreed upon in 1989 because of its devastating effect on elephant populations. But signatories to the Convention on International Trade in Endangered Species have allowed the periodic sale of confiscated ivory stockpiles to raise money for conservation. Critics say the policy fuels demand.